Of course I feel that no avatar should be censored, even those I might find reprehensible. I am not sure what would constitute a "disruptive" avatar. Subjective reasoning being what it is impossible to quantify "disruptive."
To outline a current issue, I changed avatars 4 days ago. My newest avatar was a cartoon taken from 2 Lebanese magazines. It had a camel with a small rocket in its mouth and its testicles sitting on a tree stump. In back of the stump was an Arab in traditional attire with a sledgehammer raised high, about to comedown on the stump. An English caption said, "Hezbollah Rocket Launcher."
The premise, re the article that accompanied the cartoon, was that Hezbollah had been foolish in 2006 to initiate a war with Israel because the Hezbollah arsenal is antiquated, and that Hezbollah (which just gained control of Lebanon) should keep that in mind.
A Mod, without talking/communicating with me issued me a Warning, telling me more or less that the avatar is disruptive.
To offer a richer context, I am well known on BL as someone who vehemently opposes Islam (do not confuse that with "Muslims," they are people, Islam os an ideology). Apparently the Mod felt it was a dig at Muslims, etc. Of course it was produced by Muslims themselves (the periodicals were from the AMAL political party).
Above all the preceding I do think that it would be prudent for the avatar policy to better defined.